[120] | 1 | /** |
---|
| 2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
| 3 | * or more contributor license agreements. See the NOTICE file |
---|
| 4 | * distributed with this work for additional information |
---|
| 5 | * regarding copyright ownership. The ASF licenses this file |
---|
| 6 | * to you under the Apache License, Version 2.0 (the |
---|
| 7 | * "License"); you may not use this file except in compliance |
---|
| 8 | * with the License. You may obtain a copy of the License at |
---|
| 9 | * |
---|
| 10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
| 11 | * |
---|
| 12 | * Unless required by applicable law or agreed to in writing, software |
---|
| 13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
| 14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
| 15 | * See the License for the specific language governing permissions and |
---|
| 16 | * limitations under the License. |
---|
| 17 | */ |
---|
| 18 | |
---|
| 19 | package org.apache.hadoop.record.meta; |
---|
| 20 | |
---|
| 21 | import java.io.IOException; |
---|
| 22 | |
---|
| 23 | import org.apache.hadoop.record.RecordOutput; |
---|
| 24 | |
---|
| 25 | /** |
---|
| 26 | * Represents a type information for a field, which is made up of its |
---|
| 27 | * ID (name) and its type (a TypeID object). |
---|
| 28 | */ |
---|
| 29 | public class FieldTypeInfo |
---|
| 30 | { |
---|
| 31 | |
---|
| 32 | private String fieldID; |
---|
| 33 | private TypeID typeID; |
---|
| 34 | |
---|
| 35 | /** |
---|
| 36 | * Construct a FiledTypeInfo with the given field name and the type |
---|
| 37 | */ |
---|
| 38 | FieldTypeInfo(String fieldID, TypeID typeID) { |
---|
| 39 | this.fieldID = fieldID; |
---|
| 40 | this.typeID = typeID; |
---|
| 41 | } |
---|
| 42 | |
---|
| 43 | /** |
---|
| 44 | * get the field's TypeID object |
---|
| 45 | */ |
---|
| 46 | public TypeID getTypeID() { |
---|
| 47 | return typeID; |
---|
| 48 | } |
---|
| 49 | |
---|
| 50 | /** |
---|
| 51 | * get the field's id (name) |
---|
| 52 | */ |
---|
| 53 | public String getFieldID() { |
---|
| 54 | return fieldID; |
---|
| 55 | } |
---|
| 56 | |
---|
| 57 | void write(RecordOutput rout, String tag) throws IOException { |
---|
| 58 | rout.writeString(fieldID, tag); |
---|
| 59 | typeID.write(rout, tag); |
---|
| 60 | } |
---|
| 61 | |
---|
| 62 | /** |
---|
| 63 | * Two FieldTypeInfos are equal if ach of their fields matches |
---|
| 64 | */ |
---|
| 65 | public boolean equals(Object o) { |
---|
| 66 | if (this == o) |
---|
| 67 | return true; |
---|
| 68 | if (!(o instanceof FieldTypeInfo)) |
---|
| 69 | return false; |
---|
| 70 | FieldTypeInfo fti = (FieldTypeInfo) o; |
---|
| 71 | // first check if fieldID matches |
---|
| 72 | if (!this.fieldID.equals(fti.fieldID)) { |
---|
| 73 | return false; |
---|
| 74 | } |
---|
| 75 | // now see if typeID matches |
---|
| 76 | return (this.typeID.equals(fti.typeID)); |
---|
| 77 | } |
---|
| 78 | |
---|
| 79 | /** |
---|
| 80 | * We use a basic hashcode implementation, since this class will likely not |
---|
| 81 | * be used as a hashmap key |
---|
| 82 | */ |
---|
| 83 | public int hashCode() { |
---|
| 84 | return 37*17+typeID.hashCode() + 37*17+fieldID.hashCode(); |
---|
| 85 | } |
---|
| 86 | |
---|
| 87 | |
---|
| 88 | public boolean equals(FieldTypeInfo ti) { |
---|
| 89 | // first check if fieldID matches |
---|
| 90 | if (!this.fieldID.equals(ti.fieldID)) { |
---|
| 91 | return false; |
---|
| 92 | } |
---|
| 93 | // now see if typeID matches |
---|
| 94 | return (this.typeID.equals(ti.typeID)); |
---|
| 95 | } |
---|
| 96 | |
---|
| 97 | } |
---|
| 98 | |
---|